Search results for "STATE PROPERTIES"

High-resolution laser system for the S3-Low Energy Branch

2022

International audience; In this paper we present the first high-resolution laser spectroscopy results obtained at the GISELE laser laboratory of the GANIL-SPIRAL2 facility, in preparation for the first experiments with the S$^3$-Low Energy Branch. Studies of neutron-deficient radioactive isotopes of erbium and tin represent the first physics cases to be studied at S$^3$. The measured isotope-shift and hyperfine structure data are presented for stable isotopes of these elements. The erbium isotopes were studied using the $4f^{12}6s^2$$^3H_6 \rightarrow 4f^{12}(^3 H)6s6p$$J = 5$ atomic transition (415 nm) and the tin isotopes were studied by the $5s^25p^2 (^3P_0) \rightarrow 5s^25p6s (^3P_1)$…

Effect of Incorporation of Foreign Species on the Solid State Properties of Anodic Films on Ti

2014

Characterization of the Solid State Properties of Anodic Oxides Grown on Sputter-deposited Al-Nb Alloys.

2012

Solid State Properties of Anodic Hf-Nb Mixed Oxides

2016

In last decades, HfO2 and Nb2O5 have been extensively studied due to their many potential applications, from corrosion protection to CMOS (as high-k gate dielectrics) [1-2] and ReRAM technologies [3-4]. For these technological applications compact, uniform and flat oxides are necessary, and a detailed understanding of their physical properties as a function of the fabrication conditions is needful. Scientific community gradually shifted its interest from pure metal oxides to mixed metal oxides trying to exploit the advantages of pure oxides and to suppress their disadvantages. Mixed oxides can be grown on valve metals alloys by anodizing, a simple and low cost electrochemical process for pr…

The influence of electrolyte composition on the solid state properties of anodic films on Ta-Nb alloys

2011

Tuning of solid state properties of Al-Ta mixed oxides

2014

The influence of composition on the solid state properties of anodic films on Al-Ta alloys

2015

Microelectronics is very important for almost all kinds of technology evolutions in the past four decades. In this area, the dielectrics science occupies a prominent place in providing the dominant technology in integrated capacitors or gate insulators.

Origin of the large spectral shift in electroluminescence in a blue light emitting cationic iridium(III) complex

2007

A new, but archetypal compound [ Ir( ppy- F-2) (2)Me(4)phen] PF6, where ppy- F2 is 2-(2',4'- fluorophenyl) pyridine and Me(4)phen is 3,4,7,8- tetramethyl- 1,10- phenanthroline, was synthesized and used to prepare a solid-state light-emitting electrochemical cell (LEEC). This complex emits blue light with a maximum at 476 nm when photoexcited in a thin film, with a photoluminescence quantum yield of 52%. It yields an efficient single-component solid-state electroluminescence device with a current efficiency reaching 5.5 cd A(-1) and a maximum power efficiency of 5.8 Lm Watt(-1). However, the electroluminescence spectrum is shifted with respect to the photoluminescence spectrum by 80 nm resul…

Many-body Green's function theory for electron-phonon interactions: ground state properties of the Holstein dimer

2015

We study ground-state properties of a two-site, two-electron Holstein model describing two molecules coupled indirectly via electron-phonon interaction by using both exact diagonalization and self-consistent diagrammatic many-body perturbation theory. The Hartree and self-consistent Born approximations used in the present work are studied at different levels of self-consistency. The governing equations are shown to exhibit multiple solutions when the electron-phonon interaction is sufficiently strong whereas at smaller interactions only a single solution is found. The additional solutions at larger electron-phonon couplings correspond to symmetry-broken states with inhomogeneous electron de…

Tailoring of the solid state properties of Al-Nb mixed oxides: A photoelectrochemical study

2013

Al-Nb containing mixed oxides were grown by anodizing sputter-deposited Al-Nb alloys of different compositions. A photoelectrochemical investigation was carried out in order to estimate the band gap, flat band potential, and conductivity type of these oxides as a function of their composition. The dependence of the band gap on the composition of mixed sp-d metal oxides has been rationalized by using a semiempirical correlation between the difference of electronegativity and band gap of oxides proposed in the literature some years ago and recently tested for regular d-d metal mixed oxides. The band gap increase observed as a function of Al content into the oxides seems mainly depending on th…